The Berry curvature dipole is a physical quantity that is expected to allow various quantum geometrical phenomena in a range of solid-state systems. Monolayer transition metal dichalcogenides provide an exceptional platform to modulate and investigate the Berry curvature dipole through strain. Here we theoretically demonstrate and experimentally verify for monolayer MoS2 the generation of valley orbital magnetization as a response to an in-plane electric field due to the Berry curvature dipole. The measured valley orbital magnetization shows excellent agreement with the calculated Berry curvature dipole which can be controlled by the magnitude and direction of strain. Our results show that the Berry curvature dipole acts as an effective magnetic field in current-carrying systems, providing a novel route to generate magnetization.Berry curvature is central to various topological phenomena observed in solid-state crystals [1], ultracold atoms [2, 3] and photonic architectures [4]. In view of charge transport, its effect has been assumed to be limited to magnetic systems with broken time reversal symmetry as hallmarked by the anomalous Hall effect [5]. Recent theories, however, demonstrated that in nonlinear regime, Hall effect can occur even in time-reversal symmetric systems if they are noncentrosymmetric and possess reduced symmetry (e.g., only one mirror plane) [6,7]. The nonlinear Hall effect has been attributed to the dipole moment formation of the Berry curvature in momentum space. Such Berry curvature dipole widens the scope of Berry curvature effects. It was recently proposed that in transition metal dichalcogenides (TMDs), the Berry curvature dipole may be generated when spatial symmetries of TMDs are lowered by strain [6,8]. This motivates monolayer TMDs as promising materials venue to examine the Berry curvature dipole. As exemplified by ultracold gases, where the in-depth examination of the Berry curvature effects becomes possible through the Berry curvature variation by the optical lattice modulation [2,3], the mechanical tunability of the Berry curvatures in TMDs provides an ideal avenue to explore the Berry curvature dipole.TMDs are noncentrosymmetric two dimensional materials and have two nonequivalent K and K valleys holding the opposite signs of the Berry curvature [9] ( Fig.

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An ideal 1H phase monolayer MoS2 has the mirror reflection symmetry but this symmetry is broken in common experimental situations, where the monolayer is placed on a substrate. By using the k·p perturbation theory, we investigate the effect of the mirror symmetry breaking on the Berry curvature of the material. We find that the symmetry breaking may modify the Berry curvature considerably and the spin/valley Hall effect due to the modified Berry curvature is in qualitative agreement with a recent experimental result [Science 344, 1489[Science 344, (2014], which cannot be explained by previous theories that ignore the mirror symmetry breaking. arXiv:1801.05118v2 [cond-mat.mes-hall]

1H-phase monolayer transition-metal dichalcogenides have spin-split electronic band structures near the K(K ) point due to strong spin-orbit coupling and intrinsic inversion symmetry breaking. In case of the monolayer MoX2 (X=S, Se, Te), the spin-split conduction bands cross near the K(K ) point. We show that the band crossing occurs not only along the high symmetry directions, but also along arbitrary directions due to a mirror reflection symmetry of the monolayer. As a result, n-doped monolayer MoX2 is a two-dimensional type-II nodal-line material. arXiv:1808.09585v2 [cond-mat.mtrl-sci]

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Objectives : The purpose of this study is to investigate the efficacy of external preparation containing herbal extract(Sophorae Radix, Aurantii Immaturus Fructus, Schizonepetae Spica, Forsythia fructus and Portulacea Herba) on atopic dermatitis patients. Methods : A total of 33 patients who visited the Dept. of Ophthalmology, Otolaryngology & Dermatology of Korean Medicine of Korean Medical hospital of Daejeon university from February 2012 to February 2013 were engaged in this study. Patients who corresponded the requirements were enrolled in the study. This study shows symptom comparisons before and after the use of this product. Effectiveness was evaluated through SCORAD(SCORing Atopic Dermatitis) Index, and the quality of life scale was conducted through Skindex-29. Results : 1. Comparison of the general changes through SCORAD Index indicated that the experimental group showed more statistically significant declines than the placebo group after the two-week use. 2. Comparison of changes in intensity criteria(Erythema, Edema, Oozing, Excoriation) through SCORAD Index indicated that the experimental group showed more statistically significant declines than the placebo group after the two-week use.

Objectives : The purpose of this study is to report the oriental treatment on Irritant Dermatitis Caused by Wood Vinegar on Pustulosis Palmaris et Plantaris.Methods : After using Wood Vinegar, a patient suffers from erythema, pruritus, pain, desquamation of skin and degeneration of Pustulosis Palmaris et Plantaris. The patient was admitted to Dunsan oriental hospital for 15 days and took an oriental(venesection, herbal-medicine, and vapor treatment) treatment. To evaluate the results of this treatment, the improvement of symptoms(vesicles, pruritus, pain) was identified by patient's subjective expression and in lesion-symptom improvement.Results : The symptoms caused by Wood vinegar on both palms and soles were improved but the desquamation of skin remained.Conclusions : This study shows that the oriental medical treatment effects on the irritant dermatitis caused by Wood Vinegar. Also, the public should be aware of indiscreetly-used, natural herbal products as a folk remedy.